50.3.1. Key Points Covered

Try these first

1. 1.

   What does 'unloaded condition' mean in a transistor circuit?

   Hint

   Think about how a garden hose works without a nozzle!

2. 2.

   What does the common base configuration primarily serve as?

   Hint

   Consider the input and output flow characteristics.

3. 3.

   What is the purpose of grounding the base in a common base configuration?

   • To create an unloaded condition
   • To increase input resistance
   • To reduce output voltage

   Hint

   Consider why we want to short certain components.

4. 4.

   True or False: Current gain in a common base configuration is typically less than 1.

   • True
   • False

   Hint

   Recall the key points we discussed about the transistor characteristics.

5. 5.

   If a transistor in a common base configuration has an input current of 40 μA and an output current of 39.5 μA, calculate the current gain and discuss why it is less than 1.

   Hint

   Reflect on the physical limitations and resistances affecting current transmission.

6. 6.

   Design a simple common gate configuration using a MOSFET and calculate the expected current gain if the input current is anticipated to be 50 μA.

   Hint

   Consider the properties of MOSFETs and their lack of source resistance impact.